Abstract:
:Manganese superoxide dismutase (Mn-SOD) is one of the major enzymes responsible for the defense against oxidative damage due to reactive oxygen species (ROS) in the mitochondria. The present study aimed to produce and evaluate the genetically engineered manganese superoxide dismutase protein. A recombinant plasmid containing DNA segment coding Mn-SOD protein was transformed into Escherichia coli (E. coli) Rosetta-gami strain, for expression. After induction with IPTG, an expected molecular mass of 25 kDa was detected by SDS-PAGE. After Ni-NTA affinity chromatography purification, the purity rate came up to 95%. UV spectroscopy data for our preparations indicated that a peak at 275 nm existed in the spectrum. SOD activity assay showed that the activity of the rhMn-SOD was 1890.9 U/mg. The ORAC level of rhMn-SOD was 151492.2 uM Trolox equiv/mg. Furthermore, in vitro bioactivity assay indicated that the rhMn-SOD protein can inhibit the proliferation of the leukemia K562 cells.
journal_name
Protein Expr Purifjournal_title
Protein expression and purificationauthors
Feng W,Mei S,Wenjie Y,Luyuan Hdoi
10.1016/j.pep.2010.12.008subject
Has Abstractpub_date
2011-05-01 00:00:00pages
46-52issue
1eissn
1046-5928issn
1096-0279pii
S1046-5928(10)00346-3journal_volume
77pub_type
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